| abstract |
The following chemical composition: 10% ultra and less than 50% of Al 2 O 3; 10% super and less than 50% of titanium oxide TiO 2; less than 21% ultra and 50% zirconia; less than 1% Ultra and 10%, A compound selected from the group consisting of MgO, CaO, Fe 2 O 3 , Cr 2 O 3 , MnO 2 , La 2 O 3 , Y 2 O 3 , Ga 2 O 3 and mixtures thereof; less than 20% silica SiO 2 ; a compound selected from the group consisting of less than 10% alkali metal oxides, alkaline earth metal oxides, and mixtures thereof; less than 2% other types of oxides; The above percentages are weight percentages based on oxides. Use in melting metals. [Selection figure] None |